Orbs in St Stephens Cathedral

This photo was sent in by a viewer and she says:

Orbs in St Stephens Cathedral, Vienna. I caught this photo last friday, 17. 1. 2014. I asked a friend who is a little bit more experienced than me, because I saw what I thought was orbs. And I was right. She found three of them. One on the right up if you look closely, I think, you can see a face.